Welded Pipes
SURYA ERW PIPES
- Wall Thickness: Sch 30 Sch 40
- Size Range: ½” to 16” (above on demand)
- Standards: UL – ASTM A53 Grade B
- Application: Water Systems & Fire Systems
- Material: Black and Galvanized
- Origin: India
AL JAZEERA ERW PIPES
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- Wall Thickness: Sch 30 Sch 40
- Size Range: ½” to 8” (above on demand)
- Standards: UL – ASTM A53 Grade B
- Application: Water Systems
ERW Welded Steel Pipe Supplier in Saudi Arabia
Ajal Arabia supplies ERW welded steel pipes across Saudi Arabia — the cost-effective workhorse for plumbing, HVAC, and fire protection networks. Our range covers ASTM A53 Grade B black and hot-dip galvanized pipe, API 5L Grade B and X52 line pipe, and stainless welded pipe to ASTM A312, in sizes from 1/2″ to 24″ with Schedule 40 as the everyday standard. For fire sprinkler contractors, we offer UL-listed ERW pipe options that keep NFPA 13 submittals moving. Welded pipe delivers the right balance of strength, availability, and price for water supply risers, chilled water circuits, drainage, and general fabrication — which is why it dominates MEP BOQs throughout Riyadh, Jeddah, Dammam, Jubail and Yanbu. Galvanized options suit exposed and potable-water service, while black steel pipe serves painted fire fighting and closed-loop HVAC systems. Mill test certificates to EN 10204 3.1 are available with supply. Share your pipe schedule and quantities for a fast, project-priced quotation.
Related: when to specify seamless pipe instead | valves for fire sprinkler systems | get a project-priced quotation
Black Steel vs. Galvanized Pipe
Black steel pipe is the economical choice for painted fire fighting systems and closed-loop HVAC circuits. Hot-dip galvanized pipe adds corrosion resistance, making it the right pick for potable water, exposed exterior runs and anywhere long-term protection matters. Both are supplied to ASTM A53 Grade B in sizes from 1/2″ to 24″.
Sizes & Schedules We Stock
Our welded pipe range runs from 1/2″ to 24″ to ASME B36.10M dimensions, with Schedule 40 as the everyday standard for plumbing, HVAC and fire fighting work. Heavier schedules and specialty grades are available to order — share your pipe schedule and quantities for a fast quotation.
Applications
- Fire sprinkler systems (UL-listed ERW pipe options available)
- Plumbing water supply, drainage and soil risers
- HVAC chilled water and condenser water circuits
- Natural gas distribution networks (API 5L grades)
- Structural, scaffolding and general fabrication pipe
- Irrigation and water transmission lines
- Fencing and perimeter works
Standards & Specifications
- ASTM A53 Grade B — welded black and hot-dip galvanized steel pipe
- API 5L Grade B / X52 — welded line pipe for oil & gas
- ASTM A312 — welded austenitic stainless steel pipe (TP304/316)
- UL-listed options for fire sprinkler service
- ASME B36.10M dimensions; Schedule 40 / STD as standard; sizes 1/2″–24″
- Mill test certificates to EN 10204 3.1 available with supply
Frequently Asked Questions
What is the difference between ERW, LSAW and SSAW pipe?
ERW (electric resistance welded) pipe is made from coiled strip and suits diameters up to 24″ for plumbing, HVAC and fire systems. LSAW (longitudinal submerged arc welded) and SSAW (spiral submerged arc welded) are used for large-diameter, high-pressure transmission pipelines. For building services work in Saudi Arabia, ERW to ASTM A53 is the standard choice.
Should I use black steel or galvanized pipe for my project?
Use black steel pipe for fire fighting systems and closed-loop HVAC/chilled water lines (usually painted red or as specified). Use hot-dip galvanized pipe for potable water, exposed exterior runs, and anywhere corrosion resistance matters. Tell us the service and we will confirm the right finish.
Do you stock UL-listed pipe for fire sprinkler systems?
Yes, we offer UL-listed ERW pipe options suitable for fire sprinkler installations to NFPA 13. We provide the listing documentation needed for consultant and Civil Defense material submittals — just reference the UL requirement in your enquiry.
What is pipe schedule, and what does Sch 40 mean?
Pipe schedule defines wall thickness: higher schedule numbers mean thicker walls and higher pressure ratings. Schedule 40 is the standard wall for most plumbing, HVAC and fire fighting applications in commercial buildings. We stock Sch 40 as standard and can source heavier schedules to order.
Brands We Stock: Surya, Jazeera & JASCO
Ajal Arabia stocks welded steel pipe from Surya, Jazeera, and JASCO — in the three configurations Saudi MEP BOQs call for:
- Black welded pipe, plain ends — the standard for fire fighting sprinkler systems (black steel ERW Schedule 40 to NFPA 13) and closed-loop HVAC/chilled water lines
- Galvanized welded pipe, plain ends — for potable water, exposed exterior runs, and anywhere corrosion resistance matters
- Galvanized threaded pipe with couplings — ready-to-install screwed pipe for plumbing and small-bore fire protection branches
Applications
- Fire protection — black ERW sprinkler mains, hydrant networks, and risers to NFPA 13 (confirm listing requirements with your specification)
- Plumbing — galvanized pipe for domestic water distribution in residential and commercial towers across Riyadh, Jeddah, and Dammam
- HVAC — chilled water and condenser water circuits; threaded galvanized for small-bore branches
- Construction and general fabrication — structural, fencing, and utility steel where pressure integrity is not the governing factor
Welded ERW pipe to ASTM A53 slots directly into specifications written around that standard — no equivalency arguments, no submittal friction. Where the governing code permits welded pipe, the cost and availability advantage over seamless is substantial.
Frequently Asked Questions
Can ERW welded pipe be used for fire sprinkler systems?
Yes. NFPA 13 permits steel pipe — welded or seamless — and black steel ERW Schedule 40 is the standard choice for wet sprinkler systems in Saudi Arabia. Where the specification requires listed pipe, confirm the current listing certificates for your sizes before ordering.
Black, galvanized, or threaded — which welded pipe do I need?
Black plain-end for fire fighting and closed-loop HVAC; galvanized plain-end for potable water and exposed/corrosive service; galvanized threaded with couplings for screwed plumbing and small-bore fire branches. The service and the jointing method decide.
What sizes and standards do you stock?
Welded pipe from 1/2″ up to the large diameters MEP and utility work requires, to ASTM A53 and BS 1387-type specifications as the project calls for. Send your pipe schedule and we will confirm ex-stock availability in Riyadh with delivery across the Kingdom.